Nozzle-plug for plow-meters.



J. WILKINSON NOZZLE PLUG FOR FLOW METERS.

APPLICATION FILED JUNES I912.

Patented Sept. 8, 1914.

Inventor: James W1 His tornqg.

IKinsoru unirnnsrarnsea nnr Fries.

JAMES VIILKINSON'. OF BOSTON, MASSACHUSETTS, ASSIiGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

NOZZLE-PLUG FOB. FLOW METERS.

To all in]; 0112- it may cow ('1');

Be it known that l, Jrwrzcs ll'irnixsox, a citizen of the United fil'avs. residing at Boston, in the county of Suii'ollr, State of Massachusetts, have invented certain new and useful Improvements in Nozzle-Plugs for Flow-Meters, of which the following is a specification.

This invention relates to nozzle plugs for fluid flow meters which operate on the general principle of a Pitot tube.

The object of my invention is to provide a plug of this type constructedin such a manner that its cost of manufacture is greatly decreased and its operation improved.

Briefly stated, my improved plugconsists of a stout pin, adapted'to' be inserted into the main through which the fluid to be metered is flowing, and provided on opposite sides with longitudinal grooves connected respectively with tubes which extend to the mercury cups or similar devices of the meter.

In theq c'companying drawing, Figure 1 is a longitudinal section of a nozzle plug em, bodying one form of my invention; Fig, 2 is a side view of said plug; Fig.3 is a cross, section taken on the h'ne-33, Fig. 2; Fig. 4 is a longitudinal section of the plug as used in a, vertical main; and Fig. 5 is a cross section of a modification.

The main lthrough which the'fi'uid to'be metered flows in the direction of the arrow is arranged horizontally in Figs. 1 and 2 and vertically in Fig. 4. The fiuid'may be steam, air, water or other fluid. The 1 main is tapped at some convenient point to receive the screw-threaded base 20f the nozzle plug which has a polygonal collar 3 outside of said screw-threaded portion to receive a Wrench. Projecting into the main from said base is a stout pin a which is preferably long enough to extend substantially across the main in a diametrical direction. In order to obtain the requisite strength for the pin, I form the same of greatest cross-sectional area at its base Where the greatest strain comes and gradually decrease its cross-section from the base toward the outer end. Since any such device offers a certain limited obstruction to the passage of the fluid, I prefer to make the pin as thin in cross section as possible,

.measured in a direction transverse of the Specification of Letters Patent.

.- Application filed June 5. 1812.

Patented Sept. 8, 1914. Serial No. 701,888.

main; but in a. longitudinal direction of said mam the pin is conslderably thicker, so as to obtain the requisite strength, it being notel that said pin is supported at one end only 'although a support for the other end can be provided if desired; In opposite faces of the pin are formed longitudinal grooves 6 the former facing the-moving column of fluid and the latter facing in the opposite direction. For convenience, the groove 5 may be called the leading groove and the other the trailing groove." In-order to obtain .the average efiect of thefiuid velocity-the grooves should'entend substantially theentire length ofthe. pin and sa d pin should be long enough to extend substantially ,across the main; but good results can be secured with a, shorter pin, if necessary. At the end adjacent to the base 2 each groove communicates witlnapassage '1' in said base, and said passages connect respectivelv with the tubes 8 that-lead to the meteri' The grooves may be arranged in the same plane,

as shown'in' Fig. 3 or, if desired, they may lie-arranged in di'lferent planes, slightly oblique to the longer diameter of the p1n, as shown in Fig. 5; the latter construe tlon permitting deeper grooves to be used. When the plug isinsertcd in a. vertical'niain,

I-pr'efer to drilla sinall hole 9 connecting v the two groovesnear the outer endof the pin to drain ofi' any water of condensation'that may collect in the upper groove. Ordinarily, these 4 nozzle plugs are provided with circumferentialfins integral-with the base to dissipate the heat cit/the fluid flowing into the. tubes-7. I prefer to make these fins as separate disks ll)v provided with tapped holes through which. the upper ends' of the tubes 8 are screwed, the disks being spaced apart to give the requisiteair'cham nels between them. A. nozzle plug constructed in this manner is simple and efficient, and

is much lessicostly to make than those with which I am familiar. A

f In accordance with the provisions of the patent statutes-I have describedthe principle of operation of my invention, together with the-apparatuswliich I now consider to represent thebest embodiment thereof; but

I desire to have it understood that the apparatus shown is only illustrative and that the invention can be carried outhy other means.

} 1, A nozzle plug I'm flow meters c0mpr1s- 1mg 21 screw iiimwieci base 'that is aidapteci to be threaded into an cpening' in the main marrying the fluid to be iiwomveci and. 21 10mg mi'i'cw pin aizteiiding from saici base which imrmw grooves smixemiing from and. in

em}, i-iiiiii gram es :Eacing in 0 pssite (life-c l0 iZiOIlS and separated by a partition, the basa being provided With conduits extending thei'etiirouga cunnecting z-especizively with :hu ggwe'ms.

A. 11.025416 plug for flaw metal; mmprisiw mg sseirew threaded base that is adipteii m be tizifmic lisci iiiw opening iii file main carrying t the fluid is be nietmred, :m' iong iim'i'nw pm that is tm'med mtegrai 11 .i the mid gi'miuziliy decreases in CK'GSS'SQCQOI). 130 irom the imse Kim-(1rd its miter em and has IQE'UJIUW ra-me on opposite 516% which hand from and to end of the pix mare sepzwited iimm each niher by 2. 7pm i'tisii oi-1' m g iiitisgrzil part of the plug, file m3 i being previrleci "WiSh izldapendmit can.

dams iiha; ccmmuniciita resgmciivaiy with amid grooves. i

3. A 110221;; plug E01 flow meters; crimpri inga screw! threaded base that is adapted 5:0 he ihreside, into an opening; in 'aiie the fluid to be l mit/exec a. long mi'i'nw win that is farmei integral 'wi'bh th s sin gradually in c1: ss-sasvioii [other on iheir mig'aceniz. sides by 2 pm" mmsi from base toward its outer anti, saifi 13in having a greater dimeiision in the direciion of flow 01' the fluid than in a direction pendicular thereto and provided with 0:59pm sited facing narrow grooves extenfiimg 01m gitudinally 'chereof andfsepai'at ed at their adjacent sides by a partition iorming an iiii tegrul part of the in, the base being pro videc'iv with indepen ant conduits ihai. extend iherethrough into the pin and comiuiiicaie-i wiih the said. grooves.

A. nozzle plug for flaw mwteis, ,csmgprifi- 45 ing a screw threaleol bziae that is zi-iia m 10 be ahraaidecl into 2m opening; in the sm-wing Hm fluid to be mammal anti in arrow pin that is fmmad integral wifh M163 and pmvidefli with naiww gmwczs 5U Uppfifiiiifi. sides extending longimfiimi v mieirenf and which are separated. fmm

farming an integral wt 01? the plug, M 'E pariition being provi edwitb ammii o comiecbing the grooves mar their: mien en l the base being providefl Wim imiie-i pendem'; conduits extendiing theweflimw and mmmunicating with him grunv'aza i. conveying fluid to a meier. v in Witness whereof, I liziye bereumw my hand this first (lay of Sum, 1919-.

- JAMES WILKUMEUIFL Wit-gasses:

ELMER SMITH, Hmmzm B. KAY. 

